401. (3) Love or the will is unable to effect anything by its human form without a marriage with wisdom or the understanding. This also is evident from the correspondence of the heart with the will. The embryo man lives by the heart, not by the lungs. For in the fetus the blood does not flow from the heart into the lungs, giving it the ability to respire; but it flows through the foramen ovale into the left ventricle of the heart; consequently the fetus is unable to move any part of its body, but lies enswathed, neither has it sensation, for its organs of sense are closed. So is it with love or the will, from which the fetus lives indeed, though obscurely, that is, without sensation or action. But as soon as the lungs are opened, which is the case after birth, he begins to feel and act, and likewise to will and think. From all this it can be seen, that love or the will is unable to effect anything by means of its human form without a marriage with wisdom or the understanding.